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Keys
  • Vascular plant groups
  • Club mosses
  • Ferns
  • Vegetative key to families
  • Gymnosperms
  • Flowering plants
  • Genera
  • Families

Rubiaceae

Leaves apparently whorled or opposite with interpetiolar stipules Rubiaceae
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Flowers united by their calyces into simple or compound heads
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Flowers not united with each other